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Table 4 Working memory performance for ADHD subtypes and normal controls

From: Working memory deficits in adults with ADHD: is there evidence for subtype differences?

Measure

       
 

ADHD-CT (n = 17)

ADHD-IA (n = 16)

NC (n = 18)

 
 

M

SE

M

SE

M

SE

Post hoc comparisons with covariates

Arithmetic

11.65

0.58

11.75

0.60

13.39

0.56

ns

Digit Span

11.71

0.66

11.12

0.68

13.39

0.64

NC>ADHD-IA (p = .02)b

Letter-Number-Sequencing

11.65

0.69

11.31

0.71

14.33

0.67

NC>ADHD-CT, ADHD-IA (p = 0.03)

Spatial Span

11.59

1.02

11.00

0.42

11.94

0.53

ns

PASAT Averaged over ISIa

(n = 16)

(n = 14)

(n = 17)

 

Correct

31.66

2.17

31.64

2.33

38.81

2.11

ns

Omission Errors

15.33

1.97

15.59

2.10

8.22

1.91

NC<ADHD-CT (p = 0.008)

Longest Sequence

8.25

2.58

12.31

2.62

16.91

2.50

NC<ADHD-CT (p = 0.02)

  1. Note. NC = normal control, ADHD-IA = inattentive type, ADHD-CT = combined type.
  2. aIn some cases on the PASAT there were missing data due to technical problems in the computer recording responding. This included missing data for one ADHD-CT participant, two ADHD-IA participants, and one NC participant for PASAT measures only.
  3. bExploratory analyses
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